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ThermoFuse™ Varistors

TDK ThermoFuse™ Varistors feature a wide operating voltage range of 130V_RMS to 750V_RMS. These varistors are self-protected under abnormal overvoltage conditions and offer high-energy Advanced series E2. TDK ThermoFuse varistors include either leaded square varistor elements or leaded round varistor elements. These varistors are made of epoxy molding and are flame-retardant as per UL 94 V-0. The ThermoFuse varistors come with tinned copper wire and metal compound wire terminals. Typical applications include power meters, telecom, transient voltage surger suppressors (TVSS), and household appliances.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.
Varistors 385VAC 10% 20mm AdvanceD Thermofused B72220T2381K105 TDK 1: S/11.09 500In Stock	Mfr. Part # B72220T2381K105 Mouser Part # 871-B72220T2381K105	TDK	Varistors 385VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	500In Stock	S/11.09 S/8.21 S/7.47 S/6.70 View S/6.31 S/5.72 S/4.79 S/4.71 S/4.59	Min.: 1 Mult.: 1
Industrial Surge Protectors 550V 25kA 10% 4pin 30mm B72230M0551M401 TDK 1: S/50.99 346In Stock	Mfr. Part # B72230M0551M401 Mouser Part # 871-B72230M0551M401	TDK	Industrial Surge Protectors 550V 25kA 10% 4pin 30mm Learn More about TDK mt30 thermofuse varistors	Datasheet	346In Stock	S/50.99 S/37.68 S/36.51 S/33.98 View S/30.60 S/30.24	Min.: 1 Mult.: 1
Varistors 510VAC 10% 20mm AdvanceD Thermofused B72220T2511K105 TDK 1: S/15.34 1,534In Stock	Mfr. Part # B72220T2511K105 Mouser Part # 871-B72220T2511K105	TDK	Varistors 510VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	1,534In Stock	S/15.34 S/9.69 S/8.87 S/7.55 View S/7.08 S/6.23 S/5.14 S/5.02	Min.: 1 Mult.: 1
Varistors 150V 14mm 2pin ThermoFuse Varistor B72214R2151K101 TDK 1: S/7.40 438In Stock	Mfr. Part # B72214R2151K101 Mouser Part # 871-B72214R2151K101	TDK	Varistors 150V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	438In Stock	S/7.40 S/5.45 S/4.94 S/4.40 View S/4.16 S/4.01 S/3.74 S/3.70 S/3.36	Min.: 1 Mult.: 1
Varistors 275V 14mm 2pin ThermoFuse Varistor B72214R2271K101 TDK 1: S/6.38 501In Stock	Mfr. Part # B72214R2271K101 Mouser Part # 871-B72214R2271K101	TDK	Varistors 275V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	501In Stock	S/6.38 S/4.67 S/4.24 S/3.76 View S/3.53 S/3.39 S/3.20 S/3.14 S/3.04	Min.: 1 Mult.: 1
Varistors 175VAC 10% 14mm AdvanceD Thermofused B72214T2171K105 TDK 1: S/7.12 385In Stock	Mfr. Part # B72214T2171K105 Mouser Part # 871-B72214T2171K105	TDK	Varistors 175VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	385In Stock	S/7.12 S/5.25 S/4.79 S/4.24 View S/4.01 S/3.84 S/3.56 S/3.53 S/3.49	Min.: 1 Mult.: 1
Varistors 300VAC 10% 20mm 2-pin ThermoFuse B72220R2301K101 TDK 1: S/7.82 941In Stock	Mfr. Part # B72220R2301K101 Mouser Part # 871-B72220R2301K101	TDK	Varistors 300VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	941In Stock	S/7.82 S/5.80 S/5.25 S/4.79 View S/4.01 S/3.85	Min.: 1 Mult.: 1
Varistors 320VAC 10% 20mm 2-pin ThermoFuse B72220R2321K101 TDK 1: S/7.82 664In Stock	Mfr. Part # B72220R2321K101 Mouser Part # 871-B72220R2321K101	TDK	Varistors 320VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	664In Stock	S/7.82 S/5.80 S/5.25 S/4.71 View S/4.44 S/3.89 S/3.85 S/3.65	Min.: 1 Mult.: 1
Varistors 320VAC 10% 20mm AdvanceD Thermofused B72220T2321K105 TDK 1: S/9.23 652In Stock	Mfr. Part # B72220T2321K105 Mouser Part # 871-B72220T2321K105	TDK	Varistors 320VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	652In Stock	S/9.23 S/6.85 S/6.23 S/5.61 View S/5.25 S/5.10 S/4.79 S/4.75 S/4.71	Min.: 1 Mult.: 1
Varistors 130VAC 10% 20mm 3-pin ThermoFuse B72220W2131K101 TDK 1: S/8.52 580In Stock	Mfr. Part # B72220W2131K101 Mouser Part # 871-B72220W2131K101	TDK	Varistors 130VAC 10% 20mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	580In Stock	S/8.52 S/6.31 S/5.76 S/5.02 View S/4.98 S/4.75 S/4.44 S/4.40	Min.: 1 Mult.: 1
Varistors 275VAC 10% 20mm 3-pin ThermoFuse B72220W2271K101 TDK 1: S/9.81 570In Stock	Mfr. Part # B72220W2271K101 Mouser Part # 871-B72220W2271K101	TDK	Varistors 275VAC 10% 20mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	570In Stock	S/9.81 S/7.24 S/6.62 S/5.92 View S/5.57 S/5.02 S/4.24 S/4.13 S/4.05	Min.: 1 Mult.: 1
Industrial Surge Protectors 510V 25kA 10% 4pin 30mm B72230M0511M401 TDK 1: S/55.12 58In Stock	Mfr. Part # B72230M0511M401 Mouser Part # 871-B72230M0511M401	TDK	Industrial Surge Protectors 510V 25kA 10% 4pin 30mm Learn More about TDK mt30 thermofuse varistors	Datasheet	58In Stock	S/55.12 S/41.81 S/37.21 S/31.37 View S/30.60 S/30.24	Min.: 1 Mult.: 1
Varistors 300V 14mm 2pin ThermoFuse Varistor B72214R2301K101 TDK 1: S/6.38 1,000Expected 12/14/2026	Mfr. Part # B72214R2301K101 Mouser Part # 871-B72214R2301K101	TDK	Varistors 300V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	1,000Expected 12/14/2026	S/6.38 S/4.67 S/4.24 S/3.76 View S/3.53 S/3.39 S/3.20 S/3.14 S/2.88	Min.: 1 Mult.: 1
Varistors 275VAC 10% 20mm 2-pin ThermoFuse B72220R2271K101 TDK 1: S/8.29 740Expected 10/26/2026	Mfr. Part # B72220R2271K101 Mouser Part # 871-B72220R2271K101	TDK	Varistors 275VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	740Expected 10/26/2026	S/8.29 S/6.15 S/5.57 S/4.98 View S/4.71 S/4.44 S/4.05 S/3.85 S/3.74	Min.: 1 Mult.: 1
Varistors 50VAC 10% 20mm ThermoFuse B72220T0500K101 TDK 1,500: S/7.20 Non-Stocked Lead-Time 8 Weeks	Mfr. Part # B72220T0500K101 Mouser Part # 871-B72220T0500K101	TDK	Varistors 50VAC 10% 20mm ThermoFuse Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 8 Weeks	S/7.20 S/7.16	Min.: 1,500 Mult.: 1,500
Varistors 320V 14mm 2pin ThermoFuse Varistor B72214R2321K101 TDK 1,000: S/3.21 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214R2321K101 Mouser Part # 871-B72214R2321K101	TDK	Varistors 320V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/3.21 S/3.14 S/2.90	Min.: 1,000 Mult.: 1,000
Varistors 150VAC 10% 14mm AdvanceD Thermofused B72214T2151K105 TDK 1,960: S/4.40 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214T2151K105 Mouser Part # 871-B72214T2151K105	TDK	Varistors 150VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/4.40 S/4.36	Min.: 1,960 Mult.: 1,960
Varistors 175VAC 10% 14mm AdvanceD Thermofused B72214T2171K106 TDK 1,960: S/3.54 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214T2171K106 Mouser Part # 871-B72214T2171K106	TDK	Varistors 175VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/3.54 S/3.48	Min.: 1,960 Mult.: 1,960
Varistors 300VAC 10% 14mm AdvanceD Thermofused B72214T2301K106 TDK 1: S/10.98 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214T2301K106 Mouser Part # 871-B72214T2301K106	TDK	Varistors 300VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/10.98 S/6.93 S/6.15 S/5.25 View S/4.90 S/4.32 S/3.56 S/3.50 S/3.47	Min.: 1 Mult.: 1
Varistors 300VAC 10% 14mm AdvanceD Thermofused B72214T2301K108 TDK 1,680: S/3.54 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214T2301K108 Mouser Part # 871-B72214T2301K108	TDK	Varistors 300VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/3.54 S/3.48	Min.: 1,680 Mult.: 1,680
Varistors 320VAC 10% 14mm AdvanceD Thermofused B72214T2321K106 TDK 1,960: S/2.74 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214T2321K106 Mouser Part # 871-B72214T2321K106	TDK	Varistors 320VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/2.74 S/2.68	Min.: 1,960 Mult.: 1,960
Varistors 320VAC 10% 14mm 3-pin ThermoFuse B72214W2321K101 TDK 1: S/7.08 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214W2321K101 Mouser Part # 871-B72214W2321K101	TDK	Varistors 320VAC 10% 14mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/7.08 S/5.18 S/4.71 S/4.20 View S/3.93 S/3.78 S/3.50 S/3.27	Min.: 1 Mult.: 1
Varistors 380VAC 10% 14mm 3-pin ThermoFuse B72214W2381K101 TDK 1: S/6.66 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72214W2381K101 Mouser Part # 871-B72214W2381K101	TDK	Varistors 380VAC 10% 14mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/6.66 S/4.90 S/4.44 S/3.97 View S/3.71 S/3.57 S/3.30 S/3.27 S/2.96	Min.: 1 Mult.: 1
Varistors 130VAC 10% 20mm 2-pin ThermoFuse B72220R2131K101 TDK 750: S/4.75 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72220R2131K101 Mouser Part # 871-B72220R2131K101	TDK	Varistors 130VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/4.75 S/4.63 S/4.55	Min.: 750 Mult.: 750
Varistors 150VAC 10% 20mm 2-pin ThermoFuse B72220R2151K101 TDK 750: S/4.63 Non-Stocked Lead-Time 22 Weeks	Mfr. Part # B72220R2151K101 Mouser Part # 871-B72220R2151K101	TDK	Varistors 150VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	S/4.63 S/4.55 S/4.32	Min.: 750 Mult.: 750

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